The Tor Browser / file comparison
comparison: security/nss/lib/base/libc.c
security/nss/lib/base/libc.c
- changeset 0
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| -1:000000000000 | 0:2d79f97940c1 |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 /* | |
| 6 * libc.c | |
| 7 * | |
| 8 * This file contains our wrappers/reimplementations for "standard" | |
| 9 * libc functions. Things like "memcpy." We add to this as we need | |
| 10 * it. Oh, and let's keep it in alphabetical order, should it ever | |
| 11 * get large. Most string/character stuff should be in utf8.c, not | |
| 12 * here. This file (and maybe utf8.c) should be the only ones in | |
| 13 * NSS to include files with angle brackets. | |
| 14 */ | |
| 15 | |
| 16 #ifndef BASE_H | |
| 17 #include "base.h" | |
| 18 #endif /* BASE_H */ | |
| 19 | |
| 20 #include <string.h> /* memcpy, memset */ | |
| 21 | |
| 22 /* | |
| 23 * nsslibc_memcpy | |
| 24 * nsslibc_memset | |
| 25 * nsslibc_offsetof | |
| 26 * nsslibc_memequal | |
| 27 */ | |
| 28 | |
| 29 /* | |
| 30 * nsslibc_memcpy | |
| 31 * | |
| 32 * Errors: | |
| 33 * NSS_ERROR_INVALID_POINTER | |
| 34 * | |
| 35 * Return value: | |
| 36 * NULL on error | |
| 37 * The destination pointer on success | |
| 38 */ | |
| 39 | |
| 40 NSS_IMPLEMENT void * | |
| 41 nsslibc_memcpy | |
| 42 ( | |
| 43 void *dest, | |
| 44 const void *source, | |
| 45 PRUint32 n | |
| 46 ) | |
| 47 { | |
| 48 #ifdef NSSDEBUG | |
| 49 if( ((void *)NULL == dest) || ((const void *)NULL == source) ) { | |
| 50 nss_SetError(NSS_ERROR_INVALID_POINTER); | |
| 51 return (void *)NULL; | |
| 52 } | |
| 53 #endif /* NSSDEBUG */ | |
| 54 | |
| 55 return memcpy(dest, source, (size_t)n); | |
| 56 } | |
| 57 | |
| 58 /* | |
| 59 * nsslibc_memset | |
| 60 * | |
| 61 * Errors: | |
| 62 * NSS_ERROR_INVALID_POINTER | |
| 63 * | |
| 64 * Return value: | |
| 65 * NULL on error | |
| 66 * The destination pointer on success | |
| 67 */ | |
| 68 | |
| 69 NSS_IMPLEMENT void * | |
| 70 nsslibc_memset | |
| 71 ( | |
| 72 void *dest, | |
| 73 PRUint8 byte, | |
| 74 PRUint32 n | |
| 75 ) | |
| 76 { | |
| 77 #ifdef NSSDEBUG | |
| 78 if( ((void *)NULL == dest) ) { | |
| 79 nss_SetError(NSS_ERROR_INVALID_POINTER); | |
| 80 return (void *)NULL; | |
| 81 } | |
| 82 #endif /* NSSDEBUG */ | |
| 83 | |
| 84 return memset(dest, (int)byte, (size_t)n); | |
| 85 } | |
| 86 | |
| 87 /* | |
| 88 * nsslibc_memequal | |
| 89 * | |
| 90 * Errors: | |
| 91 * NSS_ERROR_INVALID_POINTER | |
| 92 * | |
| 93 * Return value: | |
| 94 * PR_TRUE if they match | |
| 95 * PR_FALSE if they don't | |
| 96 * PR_FALSE upon error | |
| 97 */ | |
| 98 | |
| 99 NSS_IMPLEMENT PRBool | |
| 100 nsslibc_memequal | |
| 101 ( | |
| 102 const void *a, | |
| 103 const void *b, | |
| 104 PRUint32 len, | |
| 105 PRStatus *statusOpt | |
| 106 ) | |
| 107 { | |
| 108 #ifdef NSSDEBUG | |
| 109 if( (((void *)NULL == a) || ((void *)NULL == b)) ) { | |
| 110 nss_SetError(NSS_ERROR_INVALID_POINTER); | |
| 111 if( (PRStatus *)NULL != statusOpt ) { | |
| 112 *statusOpt = PR_FAILURE; | |
| 113 } | |
| 114 return PR_FALSE; | |
| 115 } | |
| 116 #endif /* NSSDEBUG */ | |
| 117 | |
| 118 if( (PRStatus *)NULL != statusOpt ) { | |
| 119 *statusOpt = PR_SUCCESS; | |
| 120 } | |
| 121 | |
| 122 if( 0 == memcmp(a, b, len) ) { | |
| 123 return PR_TRUE; | |
| 124 } else { | |
| 125 return PR_FALSE; | |
| 126 } | |
| 127 } | |
| 128 | |
| 129 /* | |
| 130 * nsslibc_memcmp | |
| 131 */ | |
| 132 | |
| 133 NSS_IMPLEMENT PRInt32 | |
| 134 nsslibc_memcmp | |
| 135 ( | |
| 136 const void *a, | |
| 137 const void *b, | |
| 138 PRUint32 len, | |
| 139 PRStatus *statusOpt | |
| 140 ) | |
| 141 { | |
| 142 int v; | |
| 143 | |
| 144 #ifdef NSSDEBUG | |
| 145 if( (((void *)NULL == a) || ((void *)NULL == b)) ) { | |
| 146 nss_SetError(NSS_ERROR_INVALID_POINTER); | |
| 147 if( (PRStatus *)NULL != statusOpt ) { | |
| 148 *statusOpt = PR_FAILURE; | |
| 149 } | |
| 150 return -2; | |
| 151 } | |
| 152 #endif /* NSSDEBUG */ | |
| 153 | |
| 154 if( (PRStatus *)NULL != statusOpt ) { | |
| 155 *statusOpt = PR_SUCCESS; | |
| 156 } | |
| 157 | |
| 158 v = memcmp(a, b, len); | |
| 159 return (PRInt32)v; | |
| 160 } | |
| 161 | |
| 162 /* | |
| 163 * offsetof is a preprocessor definition | |
| 164 */ |
